Translate socket functions in C mode

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -2621,6 +2621,18 @@ bool Converter::VisitInitListExpr(clang::InitListExpr *expr) {
   return false;
 }
 
+bool Converter::VisitCompoundLiteralExpr(clang::CompoundLiteralExpr *expr) {
+  auto record = expr->getType()->getAsRecordDecl();
+  if (!record || !record->hasAttr<clang::TransparentUnionAttr>()) {
+    return true;
+  }
+  auto init = clang::cast<clang::InitListExpr>(expr->getInitializer());
+  assert(init->getNumInits() == 1);
+  PushExprKind push(*this, ExprKind::RValue);
+  Convert(init->getInit(0));
+  return false;
+}
+
 bool Converter::VisitArraySubscriptExpr(clang::ArraySubscriptExpr *expr) {
   auto *base = expr->getBase();
   if (base->IgnoreCasts()->getType()->isPointerType()) {

cpp2rust/converter/converter.h

@@ -283,6 +283,8 @@ class Converter : public clang::RecursiveASTVisitor<Converter> {
 
   virtual bool VisitInitListExpr(clang::InitListExpr *expr);
 
+  virtual bool VisitCompoundLiteralExpr(clang::CompoundLiteralExpr *expr);
+
   virtual bool VisitArraySubscriptExpr(clang::ArraySubscriptExpr *expr);
 
   virtual bool VisitCXXNullPtrLiteralExpr(clang::CXXNullPtrLiteralExpr *expr);

rules/socket/src.cpp rules/socket/src.crules/socket/src.cpp renamed to rules/socket/src.c

@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/socket.h>
 

tests/unit/out/unsafe/socket_transparent_union.rs

@@ -0,0 +1,28 @@
+extern crate libc;
+use libc::*;
+extern crate libcc2rs;
+use libcc2rs::*;
+use std::collections::BTreeMap;
+use std::io::{Read, Seek, Write};
+use std::os::fd::{AsFd, FromRawFd, IntoRawFd};
+use std::rc::Rc;
+pub fn main() {
+    unsafe {
+        std::process::exit(main_0() as i32);
+    }
+}
+unsafe fn main_0() -> i32 {
+    let mut fd: i32 = 0;
+    let mut ssloc: sockaddr_storage = std::mem::zeroed::<sockaddr_storage>();
+    let mut slen: u32 = (::std::mem::size_of::<sockaddr_storage>() as u64 as u32);
+    assert!(
+        ((((libc::getsockname(
+            fd,
+            ((&mut ssloc as *mut sockaddr_storage) as *mut sockaddr),
+            (&mut slen as *mut u32)
+        )) == (-1_i32)) as i32)
+            != 0)
+    );
+    assert!(((((*libcc2rs::cpp2rust_errno()) == (88)) as i32) != 0));
+    return 0;
+}

tests/unit/socket_transparent_union.c

@@ -0,0 +1,15 @@
+// no-compile: refcount
+#define _GNU_SOURCE
+#include <assert.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+int main(void) {
+  int fd = 0;
+  struct sockaddr_storage ssloc;
+  socklen_t slen = sizeof(ssloc);
+  assert(getsockname(fd, (struct sockaddr *)&ssloc, &slen) == -1);
+  assert(errno == ENOTSOCK);
+  return 0;
+}